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From version < 1.3 >
edited by Xiaoling
on 2022/05/11 17:30
To version < 2.8 >
edited by Xiaoling
on 2022/07/13 17:30
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1 +(% class="wikigeneratedid" %)
2 +**Table of Contents:**
3 +
4 +{{toc/}}
5 +
6 +
1 1  = 1. Introduction =
2 2  
9 +
3 3  This chapter describe the checklist for not able to access to AT Command in Dragino LoRaWAN End Node base on STM32 chip.
4 4  
12 +
5 5  = 2. Not able to send AT Command =
6 6  
15 +
7 7  * Do you use a USB to TTL Converter? If you use RS232 converter, it won't work
8 8  * Can you see the output from console.
9 9  * Do you use the correct baudrate:
19 +** (% style="color:blue" %)**Baudrate: 9600**
20 +** (% style="color:blue" %)**Data bits: 8**
21 +** (% style="color:blue" %)**Stop bits: 1**
22 +** (% style="color:blue" %)**Parity: None**
23 +** (% style="color:blue" %)**Flow control: None**
10 10  
11 -{{{** Baudrate: 9600
12 -** Data bits: 8
13 -** Stop bits: 1
14 -** Parity: None
15 -** Flow control: None
16 -}}}
17 -
18 18  * Did you have the hardware RXD pin connected correctly according to the user manual?
19 -* Did you add the **ENTER** and **NEW LINE** after press send. Some serial utility doesn't add them by default. Below is an example for adding new line:
26 +* Did you add the (% style="color:blue" %)**ENTER**(%%) and (% style="color:blue" %)**NEW LINE**(%%) after press send. Some serial utility doesn't add them by default. Below is an example for adding new line:
20 20  
21 -[[image:https://wiki.dragino.com/images/thumb/5/5c/UART_access_1.png/600px-UART_access_1.png||height="419" width="600"]]
28 +[[image:image-20220527083416-1.png]]
22 22  
23 23  Add a new line in some software
24 24  
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25 25  
26 26  = 3. If you still not able to fix this issue =
27 27  
35 +
28 28  please send us below info at support@dragino.com
29 29  
30 30  * Screen shot for your serial utility baud rate settings.
image-20220527083416-1.png
Author
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1 +XWiki.Xiaoling
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